Dunno about the 2100 band, I'm almost certain they only do 850. I tried out Claro's prepaid unlimited net for one day. The EDGE was shockingly slow. I'm comparing it to my experience with Digicel and my old BB 8900. Yeah, I know RIM compresses the data and all that but still...
Anyway, mi woulda work wid it same way if dem call quality never so abysmal. Half the time calls wouldn't connect at all and when they did, sometimes the other person couldn't hear me. Maybe it was just a bad day and I was unfortunate enough to catch it but I hear similar complaints from ppl so I'm not convinced.